To select system import or export permissions, and/or to set site import or site export
limits, select Settings > Import & Export
Limits.
Import Permissions and
Limit
The System Import Permissions
setting determines whether Powerwall is allowed to charge from the grid. The default
setting is to allow grid charging, except in instances where the customer does not
own their system or the utility is restrictive.
Note
This setting is separate from
the Grid Charging setting
in the customer mobile app, which may overrule the installer setting for ITC
reasons.
The Site Import Limit setting
determines the amount of power (in Watts) that can be imported at the site meter.
The default is a very high value, but a limit can be set to prevent breaker
tripping. For example:
A home has six Powerwalls
which charge from the grid at 5 kW each, for a total of 30 kW (125 A)
The home has a 100 A (24 kW)
main breaker
The installer sets the Site
Import Limit to 20,000 W (83 A) to prevent the main breaker from
tripping
Export Permission and
Limit
If the customer wants to export energy to the grid and has
permission from the utility, you can change the Enable Exports setting to Enabled and configure the
site export settings. Otherwise, keep this setting disabled. If the System Export Permissions and
Site Export Limit settings
are configured without enabling this setting, Powerwall will not export energy to
the grid.
The System Export Permissions
setting determines what is allowed to export to the grid (the options are Default (Solar Only), Permanent Non Export, and
Solar and
Battery).
The Site Export Limit setting
determines the amount of power (in Watts) that can be exported to the grid. This
setting is used to protect breakers, or where the utility imposes a limit.
